98 ELEMENTARY BOTANY 
carpel of the gyneecium becomes subdivided into two chambers 
each containing one ovule. The carpels unite in the lateral 
plane ; this is clear from the situation of the two stigmas in 
the median plane. The style arises 
from the base of the gynecium, 
and is therefore described as gyno- 
basic. 
Fruit: 4 achenes. 
The nectary is at 
the base of the ovary, 
which lies at the bottom of the 
corolla tube; this tube is long, so 
that the honey can be reached 
only by large bees. The bee alights 
on the lower lip, which is large 
o and conspicuous, thrusts its head 
Fic. 129.—Mepran Ver- into the mouth of the corolla 
ae OF DEAD — tube, its back being pressed against 
the upper lip, where the anthers are. 
The stigma lies at the mouth of the corolla tube directly in 
the bee’s path, so that it gets pollinated before the bee has 
had time to get any fresh pollen from the flower. 
This Order is easily 
Labiate com- .,._.. : 
pared with ‘listinguished from all 
Scrophulari- others. Some of the 
aces. ° 
Scrophulariacee —_ re- 
semble Dead Nettle in having 
plants with square stems, opposite 
_leaves and bilabiate corollas; but 
the gynecium of the Scrophu- 
lariacew has invariably a two-celled, / _ 
not a four-celled, ovary; and the 4 499. Prorat Dta- 
fruit is a capsule, never four achenes, GRAM OF DEAD NErrie. 
as in this Order. 
It is true that the gynecium of the Labiate is exactly 
similar to that of the Boraginacez, but tliis latter Order differs 
in having regular flowers and alternate leaves. 
Poilination. 


